<template>
    <div class="app-container">
        <!--    顶部 header 区域    -->
        <mt-header fixed title="Vue-项目模拟">
            <span slot="left" @click="go" v-show="flag">
                <mt-button icon="back">返回</mt-button>
            </span>
        </mt-header>
        <!--    中间的路由 router-view 区域    -->

        <transition>
            <router-view></router-view>
        </transition>

        <!--    底部 Tabbar 区域    -->
        <nav class="mui-bar mui-bar-tab">
            <router-link class="mui-tab-item-xt" to="/home">
                <span class="mui-icon mui-icon-home"></span>
                <span class="mui-tab-label">首页</span>
            </router-link>
            <router-link class="mui-tab-item-xt" to="/member">
                <span class="mui-icon mui-icon-contact"></span>
                <span class="mui-tab-label">会员</span>
            </router-link>
            <router-link class="mui-tab-item-xt" to="/shopcar">
                <span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">
                    {{this.$store.getters.getAll}}
                </span></span>
                <span class="mui-tab-label">购物车</span>
            </router-link>
            <router-link class="mui-tab-item-xt" to="/search">
                <span class="mui-icon mui-icon-search"></span>
                <span class="mui-tab-label">搜索</span>
            </router-link>
        </nav>
    </div>
</template>
<script>
    export default {
        data() {
            return {
                flag: false
            }
        },
        created() {
            this.flag = this.$route.path === '/home' ? false : true
        },
        methods: {
            go() {
                // 点击后退
                this.$router.go(-1);
            }
        },
        watch: {
            "$route.path": function (newVal) {
                if (newVal === '/home') {
                    this.flag = false;
                } else {
                    this.flag = true;
                }
            }
        }
    }
</script>
<style scoped>
    .mint-header {
        z-index: 99;
    }

    .app-container {
        padding: 40px 0 50px 0;
        overflow-x: hidden; /* 解决切换的时候，头部和底部的问题 */
    }

    .v-enter {
        opacity: 0;
        transform: translateX(100%);
    }

    .v-leave-to {
        opacity: 0;
        transform: translateX(-100%); /*分开写是为了移出的时候，向左移出*/
        position: absolute; /* 解决切换动画的时候卡顿的问题 */
    }

    .v-enter-active,
    .v-leave-active {
        transition: all 0.5s ease;
    }

    .mui-bar-tab .mui-tab-item-xt.mui-active {
        color: #007aff;
    }

    .mui-bar-tab .mui-tab-item-xt {
        display: table-cell;
        overflow: hidden;
        width: 1%;
        height: 50px;
        text-align: center;
        vertical-align: middle;
        white-space: nowrap;
        text-overflow: ellipsis;
        color: #929292;
    }

    .mui-bar-tab .mui-tab-item-xt .mui-icon {
        top: 3px;
        width: 24px;
        height: 24px;
        padding-top: 0;
        padding-bottom: 0;
    }

    .mui-bar-tab .mui-tab-item-xt .mui-icon ~ .mui-tab-label {
        font-size: 11px;
        display: block;
        overflow: hidden;
        text-overflow: ellipsis;
    }
</style>